| 碳化作用下在役混凝土桥梁时变可靠度评估 |
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| 引用本文： | 刘爱民,岳申舟,汪罗英. 碳化作用下在役混凝土桥梁时变可靠度评估[J]. 城市道桥与防洪, 2011, 0(4): 84-86,89,10 |
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| 作者姓名： | 刘爱民 岳申舟 汪罗英 |
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| 作者单位： | 1. 上海同盛内河航道建设发展有限公司,上海,200092
2. 上海市城市建设设计研究院,上海,200125 |
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| 摘 要： | 该文总结了基于碳化的钢筋混凝土退化模型,建立了一般大气环境下考虑碳化平均锈蚀的弯曲抗力退化模型,用Monte Carlo方法编制了退化钢筋混凝土构件及系统的时变可靠度计算程序。以一座公路简支板桥为算例,结果表明:在一般大气环境下考虑碳化引起的平均锈蚀,桥梁承载能力时变可靠度在45 a左右即下降到设计目标可靠度,从而需要补强,无法达到设计使用期;同时建议将混凝土保护层开裂时间作为桥梁检查或维修参考点。
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| 关 键 词： | 碳化 平均锈蚀 Monte Carlo法 时变可靠度 |
Assessment on Time-variant Reliability of Existing RC Bridges Considering Concrete Carbonation |
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| Liu Aimin,Yue Shenzhou,Wang Luoying. Assessment on Time-variant Reliability of Existing RC Bridges Considering Concrete Carbonation[J]. Urban Roads Bridges & Flood Control, 2011, 0(4): 84-86,89,10 |
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| Authors: | Liu Aimin Yue Shenzhou Wang Luoying |
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| Affiliation: | Liu Aimin,Yue Shenzhou,Wang Luoying |
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| Abstract: | The paper summarizes the degradation model of reinforced concrete owing to carbonation,and establishes the bending resistance degradation model considering the average corrosion of carbonation in the general atmospheric environment.A time-variant reliability calculation program for the degraded RC components and systems is written by Monte Carlo method.Taking a highway single-supported plate bridge as an example,the results show that the average corrosion caused by the carbonation is considered in the gener... |
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| Keywords: | carbonation average corrosion Monte Carlo method time-variant reliability |
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